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Description
Crepis Biennis, also known as Rough Hawksbeard, is a biennial weed that is native to North America. This plant belongs to the Asteraceae family, which is the largest family of flowering plants. Crepis Biennis can grow up to 6 feet in height and produces yellow flowers during its second year of growth. This plant is commonly found in fields, meadows, and disturbed areas.
Taxonomic Information
| Domain | Eukarya |
|---|---|
| Kingdom | Plantae |
| Phylum | Spermatophyta |
| Class | Magnoliopsida |
| Order | Asterales |
| Family | Asteraceae |
| Genus | Crepis |
Appearance
Crepis Biennis has a rosette of green leaves during its first year of growth. In its second year, it produces a tall stem with alternate leaves. The stem is covered in fine hairs and has branches with yellow flowers that resemble dandelions. The flowers have a central disk surrounded by yellow ray petals. The plant produces a taproot that can grow up to 2 feet deep.
Care Guide
Crepis Biennis is a hardy weed that can grow in a variety of soil types. However, it prefers well-draining soil that is rich in organic matter. It can tolerate drought conditions but needs regular watering to grow healthy. Fertilization is not necessary as Crepis Biennis can obtain nutrients from the soil. This weed prefers full sun but can also grow in partial shade. Crepis Biennis is hardy in USDA zones 3-9.
Common Pests & Diseases
Crepis Biennis is not commonly affected by pests or diseases. However, it can be attacked by aphids, spider mites, and whiteflies. These pests can be controlled by using insecticidal soap or neem oil. Crepis Biennis can also be affected by fungal diseases such as powdery mildew and rust. These diseases can be prevented by providing good air circulation around the plant and avoiding overhead watering.
Habitat
Crepis Biennis is a common weed that is found in fields, meadows, and disturbed areas. It grows in a variety of soil types and can tolerate drought conditions. Crepis Biennis is native to North America but has been introduced to other parts of the world.
Question and Answer
Q: Is Crepis Biennis poisonous?
A: No, Crepis Biennis is not poisonous to humans or animals. However, it is considered a weed and can be invasive if not controlled.
Q: Can Crepis Biennis be used for medicinal purposes?
A: Yes, Crepis Biennis has been used in traditional medicine to treat various ailments such as coughs, colds, and bladder infections. However, more research is needed to determine its effectiveness.
Q: How can I control Crepis Biennis in my garden?
A: Crepis Biennis can be controlled by pulling it out by the roots or by using herbicides. However, herbicides should be used with caution as they can harm beneficial plants and animals.
Q: Is Crepis Biennis beneficial to the environment?
A: Yes, Crepis Biennis is beneficial to the environment as it provides food and habitat for pollinators such as bees and butterflies.
Related Plants
- Crepis Tectorum
- Crepis Sancta
- Crepis Intermedia
- Crepis Nigra
References
- USDA Plants Database: Crepis Biennis
- Missouri Botanical Garden: Crepis Biennis
- University of Maryland Extension: Rough Hawksbeard
- University of Wisconsin-Madison: Crepis Biennis
